Send an Inquiry

To receive a quote for your project, please fill in the following information, and we’ll get back to you promptly.

Submit Inventory List

Please fill in the following information, and we’ll get back to you promptly.

Home > Products > Isolators > Digital Isolators

Skyworks Solutions Inc. SI8445BA-D-IS1R

Name: SI8445BA-D-IS1R
Brand: Skyworks Solutions Inc.
SKU: SI8445BA-D-IS1R
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

Compare

Part No.:: SI8445BA-D-IS1R

Manufacturer:: Skyworks Solutions Inc.

Category:: Digital Isolators

Package:: 16-SOIC (0.154", 3.90mm Width)

Datasheet:: SI8445BA-D-IS1R.pdf

Description:: DGTL ISO 1000VRMS 4CH GP 16SOIC

Quantity:: RFQ Add To RFQ list

Payment:

Shipping:

Inventory:4,048

Please send an inquiry. Send us your inquiry, and we will respond immediately.

Product details

Overview

SI8445BA-D-IS1R from Skyworks Solutions is a quad-channel, ultra-low-power digital isolator in a 16-pin wide-body SOIC package, supporting up to 150 Mbps data rate, <9.5 ns worst-case propagation delay, and 2.5 kV_RMS isolation. It operates across 2.70–5.5 V supply rails and delivers <6 mA per channel at 100 Mbps (5 V), enabling high-speed signal isolation in motor control and isolated power supplies.

For engineers reviewing the SI8445BA-D-IS1R datasheet, SI8445BA-D-IS1R pinout, SI8445BA-D-IS1R application, or SI8445BA-D-IS1R equivalent, this page provides verified timing specs, safety certifications (UL/CSA/VDE), channel-channel skew (≤1.8 ns), CMTI (25 kV/µs), and direct alternative part guidance for industrial and automotive isolation designs.

Technical Context

The SI8445BA-D-IS1R implements capacitive isolation with on-chip RF modulation/demodulation, delivering stable timing performance across –40°C to +125°C without initialization. Its four independent bidirectional channels support asymmetric voltage operation (VDD1 ≠ VDD2) and feature integrated enable inputs with ≤8 ns enable-to-data-valid latency.

It meets reinforced insulation requirements per IEC 60747-5-2 (VDE 0884-2), UL 1577 (2500 V_RMS), and CSA 5A, with 8.0 mm creepage/clearance in the wide-body SOIC-16 package and 60-year lifetime at rated working voltage.

Key Specifications

Parameter	Value and Actual Design Meaning
Data Rate	Up to 150 Mbps - supports high-speed serial interfaces including SPI, RS-485, and isolated CAN FD transceivers.
Propagation Delay	3.0–9.5 ns (typ/max) - enables precise timing-critical applications such as gate driver feedback and ADC sampling synchronization.
Channel-Channel Skew	≤1.8 ns - ensures deterministic phase alignment across all four isolated channels for multi-signal acquisition or PWM distribution.
Supply Voltage Range	2.70–5.5 V per side - allows interoperability with 3.3 V microcontrollers and 5 V logic while maintaining isolation integrity.
CMTI	25 kV/µs - suppresses noise-induced glitches in high-dV/dt environments like motor drives and inverters.
Isolation Rating	2500 V_RMS for 1 minute - certified for reinforced insulation per UL, CSA, and VDE standards in industrial and automotive systems.
Power Consumption	<6 mA per channel at 100 Mbps (5 V) - reduces thermal load and extends battery life in portable isolated sensor nodes.

Pinout & Package

SI8445BA-D-IS1R is housed in a RoHS-compliant 16-pin wide-body SOIC package (package outline per Skyworks Doc #28), with 8.0 mm minimum creepage and clearance for reinforced insulation compliance.

Pin/Terminal	Circuit Role	Design Meaning
1, 2, 3, 4, 5, 6, 7, 8	Primary-side I/O and supply	Pins 1–4: Channel A–D inputs/outputs (bidirectional); Pins 5–6: VDD1 and GND1; Pins 7–8: EN1 and EN2 (channel enable controls).
9, 10, 11, 12, 13, 14, 15, 16	Secondary-side I/O and supply	Pins 9–12: Channel A–D isolated outputs/inputs; Pins 13–14: VDD2 and GND2; Pins 15–16: EN3 and EN4 (secondary-side enable controls).

Key Features

Feature	Design Value
Quad-channel bidirectional isolation	Four independent, fully isolated signal paths eliminate ground loops and enable system-level voltage domain separation.
No start-up initialization	Valid output data within 40 µs of power-on - eliminates boot-time delays in real-time control systems.
Ultra-low power at high speed	<1.6 mA per channel at 1 Mbps (5 V) - enables energy-efficient isolation in always-on industrial monitoring nodes.
High EMI immunity	25 kV/µs common-mode transient immunity - maintains signal integrity during switching events in power electronics.
AEC-Q100 qualified	Grade 1 (–40°C to +125°C) qualification - validated for use in automotive powertrain and onboard charger modules.

Applications

Industrial Motor Control	Isolated Switch-Mode Power Supply
Use Scenario: Isolating gate driver signals and current-sense feedback in 3-phase inverter stacks. IC Role / Device Role / Timing Role: Quad-channel isolator providing synchronized PWM input isolation and analog feedback return with ≤1.8 ns inter-channel skew. Use Value: Enables precise dead-time control and fast fault response by preserving nanosecond-level timing integrity across all power stages.	Use Scenario: Providing primary-to-secondary communication and feedback in LLC resonant converters. IC Role / Device Role / Timing Role: Transmitting isolated error amplifier output and synchronous rectifier control signals with <9.5 ns propagation delay. Use Value: Improves regulation bandwidth and transient response by minimizing isolation-induced latency in closed-loop power control.
Hybrid Electric Vehicle Onboard Charger	Isolated Data Acquisition System
Use Scenario: Isolating CAN FD bus lines and DC-link voltage sensing in bidirectional OBC modules. IC Role / Device Role / Timing Role: Supporting 150 Mbps CAN FD data transmission and high-voltage analog monitoring via separate isolated channels. Use Value: Meets ASIL-B functional safety requirements through dual-redundant channel architecture and VDE-certified 2.5 kV_RMS isolation.	Use Scenario: Interfacing isolated ADCs and DACs in high-precision test equipment with floating front-ends. IC Role / Device Role / Timing Role: Delivering simultaneous, low-skew digital data streams from multiple isolated sensor channels to a central controller. Use Value: Eliminates measurement errors caused by ground potential differences, enabling sub-LSB accuracy in 24-bit delta-sigma systems.

Industrial Motor Control

Isolated Switch-Mode Power Supply

Use Scenario: Isolating gate driver signals and current-sense feedback in 3-phase inverter stacks.

IC Role / Device Role / Timing Role: Quad-channel isolator providing synchronized PWM input isolation and analog feedback return with ≤1.8 ns inter-channel skew.

Use Value: Enables precise dead-time control and fast fault response by preserving nanosecond-level timing integrity across all power stages.

Use Scenario: Providing primary-to-secondary communication and feedback in LLC resonant converters.

IC Role / Device Role / Timing Role: Transmitting isolated error amplifier output and synchronous rectifier control signals with <9.5 ns propagation delay.

Use Value: Improves regulation bandwidth and transient response by minimizing isolation-induced latency in closed-loop power control.

Hybrid Electric Vehicle Onboard Charger

Isolated Data Acquisition System

Use Scenario: Isolating CAN FD bus lines and DC-link voltage sensing in bidirectional OBC modules.

IC Role / Device Role / Timing Role: Supporting 150 Mbps CAN FD data transmission and high-voltage analog monitoring via separate isolated channels.

Use Value: Meets ASIL-B functional safety requirements through dual-redundant channel architecture and VDE-certified 2.5 kV_RMS isolation.

Use Scenario: Interfacing isolated ADCs and DACs in high-precision test equipment with floating front-ends.

IC Role / Device Role / Timing Role: Delivering simultaneous, low-skew digital data streams from multiple isolated sensor channels to a central controller.

Use Value: Eliminates measurement errors caused by ground potential differences, enabling sub-LSB accuracy in 24-bit delta-sigma systems.

Equivalent & Alternatives

The following parts are listed as comparable options for similar digital isolator applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
ADUM141DBRZ	4-channel, 150 Mbps, 2.5 kV_RMS, SOIC-16 narrow body; higher typical supply current (7.4 mA @ 100 Mbps, 5 V)	Limited to 105°C max ambient; no AEC-Q100 qualification	Preferred where PCB space is constrained and automotive qualification is not required.
ISO6741QDWR	4-channel, 50 Mbps, 5 kV_RMS, SOIC-16 wide body; lower data rate but higher isolation rating and integrated LDO	Supports 125°C operation with TI's enhanced manufacturing process; requires external clock for full-speed operation	Selected when >3.75 kV_RMS isolation or extended temperature margin outweighs need for 150 Mbps throughput.

Compared with ADUM141DBRZ and ISO6741QDWR, the SI8445BA-D-IS1R uniquely balances 150 Mbps speed, AEC-Q100 Grade 1 qualification, and 2.5 kV_RMS isolation in a wide-body SOIC-making it optimal for high-speed automotive and industrial control where timing precision and reliability are co-constrained.

Availability

SI8445BA-D-IS1R is available at Aetrix Electronics and suitable for industrial motor control, hybrid electric vehicle onboard chargers, and isolated switch-mode power supplies requiring stable component supply and long-term lifecycle support.

Supply support for SI8445BA-D-IS1R includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Skyworks Solutions is a global semiconductor company specializing in analog and mixed-signal connectivity solutions, with leadership in RF, timing, and isolation technologies.

The SI8445BA-D-IS1R belongs to Skyworks' Si84xx family of capacitive digital isolators, engineered for high-speed, low-power, and safety-certified signal isolation in demanding industrial and automotive applications.

FAQ

What is the maximum operating temperature for SI8445BA-D-IS1R?

The SI8445BA-D-IS1R is rated for continuous operation from –40°C to +125°C at 150 Mbps with 15 pF load and 5 V supply. This specification is validated per AEC-Q100 Grade 1 requirements and applies to both wide-body SOIC package variants.

Does SI8445BA-D-IS1R require external components for basic operation?

No. SI8445BA-D-IS1R requires only VDD bypass capacitors (0.1 µF ceramic per supply rail) for stable operation. No external resistors, clocks, or initialization sequences are needed - the device begins passing valid data within 40 µs of power application.

Is SI8445BA-D-IS1R pin-compatible with other Si84xx family members?

Yes - SI8445BA-D-IS1R shares identical pinout and package dimensions with all Si844x devices in the 16-pin wide-body SOIC footprint, including Si8440BA-D-IS1R and Si8442BA-D-IS1R. Channel count, directionality, and enable functionality are preserved across the family.

What safety certifications does SI8445BA-D-IS1R hold?

SI8445BA-D-IS1R is certified to UL 1577 (2500 V_RMS), CSA Component Notice 5A (IEC 60950-1/61010-1), and VDE IEC 60747-5-2 (reinforced insulation). All certifications apply to the 2.5 kV_RMS isolation rating and are production-tested to 3.0 kV_RMS for 1 second.

Can SI8445BA-D-IS1R operate with different supply voltages on each side?

Yes. SI8445BA-D-IS1R supports independent 2.70–5.5 V supplies on VDD1 and VDD2, enabling level translation between 3.3 V controllers and 5 V peripherals without external logic. Input thresholds remain compatible across the full supply range.

SI8445BA-D-IS1R Specifications

Product attributes: Attribute value

Manufacturer:: Skyworks Solutions Inc.

Series:: -

Package/Case:: 16-SOIC (0.154", 3.90mm Width)

Packaging:: Tape & Reel (TR)

Product Status:: Not For New Designs

Technology:: Capacitive Coupling

Type:: General Purpose

Isolated Power:: No

Number of Channels:: 4

Inputs - Side 1/Side 2:: 4/0

Channel Type:: Unidirectional

Voltage - Isolation:: 1000Vrms

Common Mode Transient Immunity (Min):: 25kV/µs (Typ)

Data Rate:: 150Mbps

Propagation Delay tpLH / tpHL (Max):: 9.5ns, 9.5ns

Pulse Width Distortion (Max):: 2.5ns

Rise / Fall Time (Typ):: 3.8ns, 2.8ns

Voltage - Supply:: 2.7V ~ 5.5V

Grade:: -

Qualification:: -

Operating Temperature:: -40°C ~ 125°C

Mounting Type:: Surface Mount

Supplier Device Package:: 16-SOIC

SI8445BA-D-IS1R FAQ

1.How can I place an order for SI8445BA-D-IS1R through Aetrix?

Please submit a Request for Quotation (RFQ) for SI8445BA-D-IS1R on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for SI8445BA-D-IS1R reliable?

The price and inventory of SI8445BA-D-IS1R are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SI8445BA-D-IS1R is usually 5 days.

3.What payment methods are accepted for SI8445BA-D-IS1R?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SI8445BA-D-IS1R transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for SI8445BA-D-IS1R?

SI8445BA-D-IS1R orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your SI8445BA-D-IS1R order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for SI8445BA-D-IS1R?

For technical support, including SI8445BA-D-IS1R datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SI8445BA-D-IS1R requirements.

6.How does Aetrix verify that SI8445BA-D-IS1R is sourced from the original manufacturer or authorized distributors?

All SI8445BA-D-IS1R products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that SI8445BA-D-IS1R meets industry standards.

7.What is the process for return or replacement of SI8445BA-D-IS1R?

All SI8445BA-D-IS1R units undergo pre-shipment inspection (PSI). If there is an issue with SI8445BA-D-IS1R, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The SI8445BA-D-IS1R part is unused and in its original packaging.

Return procedure for SI8445BA-D-IS1R:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

Tech Hub

2026-09-09 Counterfeit Electronic Components: How to Detect, Authenticate, and Test Suspect Parts

Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …

2026-09-08 Obsolete Electronic Components: How to Source and Evaluate Replacements

A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.

2026-09-07 TTL vs CMOS Logic Levels: 74HC and 74HCT Compatibility Explained

TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.

2026-09-04 Logic Level Shifter: How to Connect 3.3V and 5V Logic Safely

A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.

2026-09-03 74HC595 vs TPIC6B595: Output Drive, Pinout, Current, and Load Selection

The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…

2026-09-02 74HC595 Pinout, Timing, Output Current, and Applications

The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…

2026-09-01 Latch vs Flip-Flop: Timing, Differences and Design Choices

A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…

2026-08-30 D Latch Circuit: Truth Table, Timing, ICs and Applications

A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …

2026-08-28 SR Latch Explained: NOR and NAND Circuits, Truth Tables, and Applications

An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…

2026-08-27 Latch Circuit: SR and D Latches, Truth Tables, Timing, and Applications

Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…